The PureBOOST GO features a brand-new Expanded Landing Zone - a wider forefoot platform for increased forefoot stability during multi-directional movements. A deconstructed circular knit upper, crafted from a breathable fabric, improves flexibility and freedom of movement with each step. The full-length BOOST midsole, adidas’ industry-defining technology, offers runners endless energy return Excellent used condition. Possibly the softest, bounciest and most comfy Boost shoes I've tried!